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Add ACPI support for USB driver.

Description

Add ACPI support for USB driver.
This adds ACPI device path on devinfo(8) output and
show value of _UPC(usb port capabilities), _PLD (physical location of device)
when hw.usb.debug >= 1 .

Reviewed by: hselasky
Differential Revision: https://reviews.freebsd.org/D20630

Details

Provenance
takawataAuthored on
Reviewer
hselasky
Differential Revision
D20630: ACPI support for USB , mainly hub.
Parents
rS349160: Fix passing ${CONF_FILES} (which contains MAKE_CONF and
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